Audio signal supply apparatus

An audio signal supply apparatus comprising:

• an area setting device that is used to specify a listening area in an acoustic space;
• a path identifying device that identifies propagation paths to be followed by sounds output from respective ones of a plurality of speakers constituting a speaker array until the sounds reach the listening area and obtains pieces of propagation path information respectively related to the propagation paths;
• and
• a signal processing device that identifies pieces of window function information that give such directivities as to cover the entire listening area to the sounds output from the respective ones of the plurality of speakers based on the pieces of propagation path information and a size of the listening area,
• wherein said signal processing device carries out weighting on respective signal levels of a plurality of audio signals branched from an externally input audio signal and corresponding in number to the plurality of speakers by using the pieces of window function information to obtain output signals that are to be supplied to the respective ones of the plurality of speakers.